If safety-relevant building products and components deviate from the introduced technical building regulations or if there are no technical regulations at all, the safety of the building must be proven in another way. If this cannot be done by means of general verification in accordance with Art. 17 in conjunction with Art. 18 and 19 of the Bavarian Building Code (BayBO), approval is required in individual cases (ZiE).
Safety-relevant types of construction that deviate significantly from the introduced technical building regulations or for which there are no generally recognized rules of technology also require a general type approval. If this is not available, a project-related type approval (vBg) is required.